<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
	<meta charset="utf-8" />
<style type="text/css">
[lang|=en]
{
border:5px solid blue;
}
a:link {color: #FF0000}		/* 未访问的链接 */
a:visited {color: #00FF00}	/* 已访问的链接 */
a:hover {color: #FF00FF}	/* 鼠标移动到链接上 */
a:active {color: #0000FF}	/* 选定的链接 */
p:first-child {font-weight: bold;}
li:first-child {text-transform:uppercase;}
div {width: 500px;}
p {text-indent: 20%;}
<div>
</style>
</head>

<body>
<h1>可以应用样式：</h1>
<lable lang="en" > 测试</lable>
<br />
<a lang="en-us" href="http://www.isoftstone.com">isoftstone</a>
<hr />

<h1>无法应用样式：</h1>
<p lang="us">Hi!</p>
<a lang="zh" href="http://www.isoftstone.com">isoftstone</a>

<div>
<p>These are the necessary steps:</p>
<ul>
<li>Intert Key</li>
<li>Turn key <strong>clockwise</strong></li>
<li>Push accelerator</li>
</ul>
<p>Do <em>not</em> push the brake at the same time as the accelerator.</p>
</div>
</body>
</html>